Question

49. Which of the following is true of the biologically important molecules ADP, AMP, and ATP?

A. all are both phosphoric anhydrides and phosphoric esters

B. ADP and AMP are both phosphoric anhydrides and phosphoric esters, but ATP is only a phosphoric ester.

C. AMP and ATP are both phosphoric anhydrides and phosphoric esters, but ADP is only a phosphoric ester.

D. ADP and ATP are both phosphoric anhydrides and phosphoric esters, but AMP is only a phosphoric ester.

45. At room temperature, which combination of reactants is commonly used to synthesize amides?

A. an amine and an acid anhydride.

B. an amine and an alcohol

C. an amine and a carboxylic acid

D. none of these, amides cannot be synthesized at room temperature

37. Which of the following is true of heparin?

A. it is oligosaccharide

B. it has a formula weight of 6, 000 g/mole

C. it has a formula weight of 30, 000 g/mole

D. it has a range of formula weights of 6, 000 to 30,000 g/mole

35. Which of the following contains β (1→4) glycosidic bonds?

A. amylopectin   B. amylose cellulose D. none of the listed

33. Which of the following is true of amylopectin?

A. it consists of as many as 4000 D-glucose units linearly linked by α(1→4) glycosidic bonds

B. it consists of as many as 4000 D-glucose units linearly linked by β(1→4) glycosidic bonds

C. it consists of as many as 10,000 D--glucose units linearly linked by α(1→4) glycosidic bonds and there are branches every 24-30 units via α(1→6) glycosidic bonds

D. it consists of as many as 10,000 D--glucose units linearly linked by β (1→4) glycosidic bonds and there are branches every 24-30 units via β (1→6) glycosidic bonds

Answer 1